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Can you explain thermistor? Write short notes on back emf and internal resistance of a cell.
what is radioactivity?
Does solar radiation contain a complete spectrum of all forms of electromagnetic radiation? Yes it does. It have all the forms of radiation, but 99% of its energy is carried
Explain about the term holography. Holography Holography (through the Greek hòlòs entire + grafè writing, drawing) is a technique which permits the light scattered by an obj
Q. Give the basic assumptions made in free electron model of solid. OR Write down basic postulates of Sommerfield's free electron gas model. Show that the number of ene
operation symmetry
A convex lens of refractive index 1.5 has a focal length of 18 cm in air. Measure the change in its focal length when it is immersed in water of refractive index. Distinguish am
B-Infrared (IR) Radiant Heat Heat radiation can be achieved by using infrared (IR) radiation it penetrates about 3mm in the skin. excessive exposure can cause erythema(redden
Q. What is Fresnel diffraction? a) The source as well as the screen are at finite distances from the obstacle producing diffraction. b) The wave front suffer diffraction is
What is diffraction of light? Illustrate a graph showing the variation of intensity with angle in a single slit diffraction experiment. Write single feature which distinguishes the
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